EP1201289B1 - Filtre avec élément de sécurité retenu - Google Patents

Filtre avec élément de sécurité retenu Download PDF

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Publication number
EP1201289B1
EP1201289B1 EP01124558A EP01124558A EP1201289B1 EP 1201289 B1 EP1201289 B1 EP 1201289B1 EP 01124558 A EP01124558 A EP 01124558A EP 01124558 A EP01124558 A EP 01124558A EP 1201289 B1 EP1201289 B1 EP 1201289B1
Authority
EP
European Patent Office
Prior art keywords
filter element
housing
end cap
safety
safety filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01124558A
Other languages
German (de)
English (en)
Other versions
EP1201289A1 (fr
Inventor
Jon S. Wake
Donald E. Stiemke
James A. Bass
Mark V. Holzmann
Paul B. Rear
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cummins Filtration Inc
Original Assignee
Fleetguard Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fleetguard Inc filed Critical Fleetguard Inc
Publication of EP1201289A1 publication Critical patent/EP1201289A1/fr
Application granted granted Critical
Publication of EP1201289B1 publication Critical patent/EP1201289B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0095—Means acting upon failure of the filtering system, e.g. in case of damage of the filter elements; Failsafes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B01D46/64—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series arranged concentrically or coaxially
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • F02M35/02475—Air cleaners using filters, e.g. moistened characterised by the shape of the filter element
    • F02M35/02483—Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2271/00—Sealings for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2271/02—Gaskets, sealings
    • B01D2271/027—Radial sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2275/00—Filter media structures for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2275/20—Shape of filtering material
    • B01D2275/201—Conical shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/60—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the intake of internal combustion engines or turbines

Definitions

  • the invention relates to fluid filters, and more particularly to filters having a safety or secondary filter element in addition to a primary or main filter element
  • this invention relates to a filter with the features of the introductory part of claim 1.
  • the filter which forms the starting point of the invention ( US 5,120,337 A ) has a safety filter element that is provided with a tubular flange with an external thread. This safety filter element is secured by means of this thread to the housing which at this point has a mating internal thread on a flange extending axially into the housing from the first end of the housing. In order to seal the safety filter element there is provided a gasket between the axial end of the safety filter element and an axial sealing area of the housing.
  • the object of the present invention is to provide a safety filter element in such a filter which remains intact and maintains its seal in a particularly simple and effective manner.
  • the invention provides for a snap fit connection of the safety filter element with the detent member on the housing. This is simple and effective. No separate gasket is provided, because sealing is effected by the sealing surface, because the end cap of safety filter element is radially compressed in sealing relation between the safety filter element and the sealing surface. This is particularly simple and effective.
  • Claim 2 gives a specific teaching regarding the detailed construction of the flange so that it can provide both functions, namely retaining function and sealing function.
  • Claim 3 further provides features that are related to an easier removal of the primary filter element from the filter.
  • Claim 4 relates to an additional function of the flange, namely a sealing function for the primary filter element.
  • Claim 5 gives a further specification in this respect.
  • Figs. 1 and 2 show a filter 10 having a housing 12 including a base 14 and a cover 16 and extending along an axis 18 between first and second axial ends 20 and 22.
  • a closed loop primary or main filter element 24 extends axially in the housing between first and second axial ends 26 and 28 respectively adjacent first and second axial ends 20 and 22 of the housing.
  • Primary filter element 24 is typically annular, though other shapes are possible such as oval.
  • Primary filter element 24 has a hollow interior 30. Dirty air as shown at arrow 32 enters housing inlet 34 and flows into annular space 36 and then radially inwardly through filter element 24 into hollow interior 30 and then flows axially rightwardly in Figs. 1 and 2 and exits housing outlet 38 as shown at clean air arrow 40.
  • Filter element 24 is typically pleated filter media potted in soft compressible urethane end caps 42 and 44 at respective axial ends 26 and 28 and axially compressed in sealing relation in the housing to prevent bypass of dirty air from annular space 36 into hollow interior 30.
  • End cap 44 spans hollow interior 30 to close the leftward axial end of the filter element.
  • End cap 42 is additionally radially compressed against flange 46 extending axially leftwardly from axial end 20 of the housing, such that end cap 42 is both axially and radially compressed in sealing relation with the housing.
  • Safety filter element 48 is provided in hollow interior 30 of primary filter element 24.
  • Safety filter element 48 has a leftward axial end cap 50 spanning and closing hollow interior 52 of safety filter element 48.
  • Safety filter element 48 has a rightward annular end cap 54, Fig. 3, at rightward axial end 20 of the housing and radially compressed against flange 46 in sealing relation.
  • Safety filter element 48 is preferably conical and formed of pleated filter media or fibrous media between inner and outer liners 56 and 58, Fig. 3.
  • Axial end 20 of housing 12 has a detent member 60 on flange 46, Figs. 3, 4, engaging and retaining end cap 54 independently of primary filter element 24 to retain safety filter element 48 in housing 12 upon removal of primary filter element 24 from the housing.
  • Cover 16 is mounted to base 14 in standard manner, as by overcenter clamps, bayonet couplings, or the like, as is known. Cover 16 is removed from base 14 to gain access to primary filter element 24 to enable removal and servicing and/or replacement thereof. During removal of primary filter element 24, it is desired that safety filter element 48 remain in place in the housing, including its sealed relation against housing end 20, to protect downstream engine components.
  • Detent member 60 on flange 46 has a ridge or bump 62 extending radially toward safety filter element 48.
  • End cap 54 has a shoulder 64 engaging ridge 62 in interference fit to prevent or at least hinder axial removal of safety filter element 48 from housing 12.
  • Flange 46 is an annular axial projection spaced radially outwardly of and circumscribing safety filter element 48.
  • Flange 46 has an inner sealing surface 66 extending axially from end 20 of the housing toward ridge 62.
  • End cap 54 is radially compressed in sealing relation between outer liner 58 of safety filter element 48 and sealing surface 66.
  • Ridge 62 has an engagement surface 68 extending from sealing surface 66 axially leftwardly and radially inwardly toward safety filter element 48 to an inner lip 70.
  • Engagement surface 68 faces radially inwardly and axially rightwardly toward right axial end 20 of the housing.
  • Ridge 62 has a tapered surface 72 extending from inner lip 70 radially outwardly and axially leftwardly toward left axial end 22 of the housing.
  • End cap 54 has a sealing surface 74 extending axially from right axial end 20 of the housing toward shoulder 64. Sealing surface 74 of end cap 54 extends along and sealingly engages inner sealing surface 66 of flange 46. Shoulder 64 extends from sealing surface 74 axially leftwardly and radially inwardly toward safety filter element 48. Shoulder 64 faces radially outwardly and axially leftwardly toward left axial end 22 of the housing.
  • Sealing surface 74 of the end cap slides along tapered surface 72 of ridge 62 and past inner lip 70 during rightward axial insertion of safety filter element 48 into housing 12. Engagement surface 68 and inner lip 70 lie in the path of movement of shoulder 64 upon attempted leftward axial withdrawal of safety filter element 48 from housing 12.
  • Safety filter element 48 extends axially between right and left axial ends 76 and 78, Fig. 2, proximate respective right and left axial ends 26 and 28 of primary filter element 24.
  • Safety filter element 48 is tapered to a narrower lateral width at end 78 relative to end 76 to provide lateral clearance between left end 78 of the safety filter element and left end 28 of the primary filter element in hollow interior 30 of the primary filter element to permit lateral rocking back and forth of left end 28 of primary filter element 24 during removal thereof, without dislodging safety filter element 48.
  • Detent 60 and flange 46 provide a combined retention detent and sealing flange extending from right end 20 of the housing axially toward left end 22 of the housing.
  • the combined retention detent and sealing flange is radially between end cap 54 of safety filter element 48 and end cap 42 of primary filter element 24.
  • Flange 46 circumscribes hollow interior 30.
  • the flange has the noted inner sealing surface 66, Fig. 4, facing radially inwardly toward hollow interior 30 and engaging end cap 54 of safety filter element 48 in radially compressive sealing relation.
  • the flange has an outer sealing surface 80 facing radially away from hollow interior 30 and engaging end cap 42 of primary filter element 24 in radially compressive sealing relation.
  • Detent 60 is formed on inner sealing surface 66 of the flange and engages and retains end cap 54 of safety filter element 48 in interference fit independently of end cap 42 of primary filter element 24 to retain safety filter element 24 in housing 12 upon axial withdrawal of primary filter element 24 from the housing.
  • End caps 26 and 28 of primary filter element 24 and end caps 54 and 50 of safety filter element 48 are formed of soft compressible elastomer material such as urethane. When it is time to remove and replace safety filter element 48, the safety filter element is pulled axially leftwardly with enough force to radially compress shoulder 64 past inner lip 70.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)

Claims (5)

  1. Filtre comportant un boîtier (12) s'étendant le long d'un axe (18) entre des première et deuxième extrémités axiales (20, 22), un élément filtrant primaire (24) en boucle fermée s'étendant axialement dans ledit boîtier entre des première et deuxième extrémités axiales (26, 28) respectivement adjacentes auxdites première et deuxième extrémités axiales (20, 22) dudit boîtier (12), ledit élément filtrant primaire (24) présentant un intérieur creux (30), un élément filtrant (48) de sécurité en boucle fermée dans ledit intérieur creux (30) dudit élément filtrant primaire (29), ledit élément filtrant (48) de sécurité étant doté d'un bouchon (54) d'extrémité au niveau de ladite première extrémité (20) dudit boîtier, ladite première extrémité (20) dudit boîtier (12) étant dotée d'un élément (60) de cran s'enclenchant avec ledit bouchon (54) d'extrémité et le retenant indépendamment dudit élément filtrant primaire (24) pour retenir ledit élément filtrant (48) de sécurité dans ledit boîtier (12) suite au retrait dudit élément filtrant primaire (24) dudit boîtier (12),
    caractérisé en ce que
    ledit élément (60) de cran comporte une bride (46) s'étendant axialement dans ledit boîtier (12) à partir de ladite première extrémité (20) dudit boîtier, ladite bride (46) présentant un bourrelet (62) s'étendant radialement en direction dudit élément filtrant (48) de sécurité, ledit bouchon (54) d'extrémité présentant un épaulement (64) s'enclenchant avec ledit bourrelet (62) en un ajustement serré pour s'opposer au retrait axial dudit élément filtrant (48) de sécurité dudit boîtier (12),
    ladite bride (46) est espacée radialement vers l'extérieur par rapport audit élément filtrant (48) de sécurité et entoure celui-ci, ladite bride (46) présente une surface (66) d'étanchéité s'étendant axialement de ladite première extrémité (20) dudit boîtier (12) vers ledit bourrelet (62), et ledit bouchon (54) d'extrémité est comprimé radialement en relation étanche entre ledit élément filtrant (48) de sécurité et ladite surface (66) d'étanchéité.
  2. Filtre selon la revendication 1, caractérisé en ce que
    ledit bourrelet (62) présente une surface (68) d'interaction s'étendant radialement vers l'intérieur à partir de ladite surface (66) d'étanchéité en direction dudit élément filtrant (48) de sécurité jusqu'à un rebord intérieur (70),
    ladite surface (68) d'interaction est orientée axialement en direction de ladite première extrémité (20) dudit boîtier (12),
    ledit bourrelet (62) présente une surface inclinée (72) s'étendant radialement vers l'extérieur à partir dudit rebord intérieur (70) et axialement en direction de ladite deuxième extrémité (22) dudit boîtier (12), ledit bouchon (54) d'extrémité présente une surface (74) d'étanchéité s'étendant axialement à partir de ladite première extrémité (20) dudit boîtier (12) en direction dudit épaulement (64),
    ladite surface (74) d'étanchéité dudit bouchon (54) d'extrémité s'étend le long de ladite surface (66) d'étanchéité de ladite bride (46) et interagit avec celle-ci de façon étanche, ledit épaulement (64) s'étend radialement vers l'intérieur à partir de ladite surface (74) d'étanchéité dudit bouchon (54) d'extrémité en direction dudit élément filtrant (48) de sécurité et est orienté axialement en direction de ladite deuxième extrémité (22) dudit boîtier (12), ladite surface (74) d'étanchéité dudit bouchon (54) d'extrémité coulissant le long de ladite surface inclinée (72) dudit bourrelet (62) et au-delà dudit rebord intérieur (70) dudit bourrelet (62) au cours de l'insertion axiale dudit élément filtrant (48) de sécurité dans ledit boîtier (12), et ladite surface (68) d'interaction et ledit rebord intérieur (70) dudit bourrelet se trouvent sur la trajectoire de mouvement dudit épaulement (64) lorsqu'on tente de retirer axialement ledit élément filtrant (48) de sécurité dudit boîtier (12).
  3. Filtre selon la revendication 2, caractérisé en ce que
    ledit élément filtrant (48) de sécurité s'étend axialement entre des première et deuxième extrémités axiales (76, 78) respectivement proches desdites première et deuxième extrémités axiales (26, 28) dudit élément filtrant primaire (24), ledit élément filtrant (48) de sécurité est aminci jusqu'à une largeur latérale réduite au niveau de ladite deuxième extrémité (78) par rapport à ladite première extrémité (76) pour donner un jeu latéral entre ladite deuxième extrémité (78) dudit élément filtrant (48) de sécurité et ladite deuxième extrémité (28) dudit élément filtrant primaire (24) dans ledit intérieur creux (30) dudit élément filtrant primaire (24) afin de permettre une agitation latérale alternative de ladite deuxième extrémité (28) dudit élément filtrant primaire (24) pendant son retrait sans déloger ledit élément filtrant (48) de sécurité.
  4. Filtre selon l'une quelconque des revendications 1 à 3, caractérisé en ce que
    ledit élément filtrant primaire (24) est muni d'un bouchon (42) d'extrémité au niveau de ladite première extrémité (20) dudit boîtier (12), la bride (46) de l'élément (60) de cran est conçue comme la combinaison d'un cran de rétention et d'une bride (46) d'étanchéité s'étendant axialement à partir de ladite première extrémité (20) dudit boîtier (12) en direction de ladite deuxième extrémité (22) dudit boîtier (12) et étant comprise radialement entre ledit bouchon (54) d'extrémité dudit élément filtrant (48) de sécurité et ledit bouchon (42) d'extrémité dudit élément filtrant primaire (24).
  5. Filtre selon la revendication 4, caractérisé en ce que
    ladite bride (46) présente une surface (80) extérieure d'étanchéité orientée radialement vers l'extérieur à l'opposé dudit intérieur creux (30) et interagissant avec ledit bouchon (42) d'extrémité dudit élément filtrant primaire (24) dans une relation d'étanchéité par compression radiale.
EP01124558A 2000-10-20 2001-10-13 Filtre avec élément de sécurité retenu Expired - Lifetime EP1201289B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/692,976 US6383244B1 (en) 2000-10-20 2000-10-20 Filter with retained safety element
US692976 2000-10-20

Publications (2)

Publication Number Publication Date
EP1201289A1 EP1201289A1 (fr) 2002-05-02
EP1201289B1 true EP1201289B1 (fr) 2008-01-02

Family

ID=24782822

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01124558A Expired - Lifetime EP1201289B1 (fr) 2000-10-20 2001-10-13 Filtre avec élément de sécurité retenu

Country Status (3)

Country Link
US (1) US6383244B1 (fr)
EP (1) EP1201289B1 (fr)
DE (1) DE60132151T2 (fr)

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US6383244B1 (en) 2002-05-07
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EP1201289A1 (fr) 2002-05-02

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